/*
 * @(#)SignedByteConverter.java
 * 
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Library General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
package cn.edu.ynu.sei.dict.plugin.stardict.util;

/**
 * Convert the unsigned byte(s) into a integer or hexadecimal digit form. 
 * @author 88250
 * @version 1.1.1.5, Feb 16, 2008
 */
public class ByteConverter {

	//	/**
	//	 * convert unsigned one byte into a hexadecimal digit
	//	 * @param b byte
	//	 * @return convert result
	//	 */
	//	public static String byteToHex(byte b) {
	//		int i = b & 0xFF;
	//		return Integer.toHexString(i);
	//	}

	/**
	 * convert unsigned 4 bytes into a 32-bit integer
	 * @param buf bytes buffer
	 * @param pos beginning <code>byte</code>> for converting
	 * @return convert result
	 */
	public static long unsigned4BytesToInt(byte[] buf, int pos) {
		int ret = 0;

		ret += unsignedByteToInt(buf[pos++]) << 24;
		ret += unsignedByteToInt(buf[pos++]) << 16;
		ret += unsignedByteToInt(buf[pos++]) << 8;
		ret += unsignedByteToInt(buf[pos++]) << 0;

		return ret;
	}

	/**
	 * convert unsigned one byte into a 32-bit integer
	 * @param b byte
	 * @return convert result
	 */
	public static int unsignedByteToInt(byte b) {
		return b & 0xFF;
	}

}
